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  1. Lucene - Core
  2. LUCENE-2500

A Linux-specific Directory impl that bypasses the buffer cache

Details

    • Improvement
    • Status: Closed
    • Major
    • Resolution: Fixed
    • None
    • 3.1, 4.0-ALPHA
    • modules/other
    • None
    • New

    Description

      I've been testing how we could prevent Lucene's merges from evicting
      pages from the OS's buffer cache. I tried fadvise/madvise (via JNI)
      but (frustratingly), I could not get them to work (details at
      http://chbits.blogspot.com/2010/06/lucene-and-fadvisemadvise.html).

      The only thing that worked was to use Linux's O_DIRECT flag, which
      forces all IO to bypass the buffer cache entirely... so I created a
      Linux-specific Directory impl to do this.

      Attachments

        1. LUCENE-2500.patch
          25 kB
          Michael McCandless

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            mikemccand Michael McCandless
            mikemccand Michael McCandless
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            Dates

              Created:
              Updated:
              Resolved: